제출 #878872

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
878872		OAleksa	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	100 / 100	1223 ms	125944 KiB

sortbooks

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define f first
#define s second
const int maxn = 1e6 + 69;
int n, q, a[maxn], st[4 * maxn], ans[maxn];
vector<tuple<int, int, int>> g[maxn];
void upd(int v, int tl, int tr, int p, int x) {
	if (tl == tr)
		st[v] = max(st[v], x);
	else {
		int mid = (tl + tr) / 2;
		if (p <= mid)
			upd(v * 2, tl, mid, p, x);
		else
			upd(v * 2 + 1, mid + 1, tr, p, x);
		st[v] = max(st[v * 2], st[v * 2 + 1]);
	}
}
int qry(int v, int tl, int tr, int l, int r) {
	if (tl > r || tr < l)
		return 0;
	else if (tl >= l && tr <= r)
		return st[v];
	else {
		int mid = (tl + tr) / 2;
		return max(qry(v * 2, tl, mid, l, r), qry(v * 2 + 1, mid + 1, tr, l, r));
	}
}
signed main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
   int tt = 1;
  	//cin >> tt;
   while (tt--) {
   	cin >> n >> q;
   	for (int i = 1;i <= n;i++)
   		cin >> a[i];
   	vector<int> stck;
   	for (int i = 1;i <= q;i++) {
   		int l, r, k;
   		cin >> l >> r >> k;
   		g[r].push_back({l, k, i});
   	}
   	for (int i = 1;i <= n;i++) {
   		while (!stck.empty() && a[stck.back()] <= a[i])
   			stck.pop_back();
   		if (!stck.empty()) 
   			upd(1, 1, n, stck.back(), a[i] + a[stck.back()]);
   		for (auto u : g[i]) {
   			int l, k, ind;
   			tie(l, k, ind) = u;
   			ans[ind] = (qry(1, 1, n, l, i) <= k);
   		}
   		stck.push_back(i);
   	}
   	for (int i = 1;i <= q;i++)
   		cout << ans[i] << '\n';
	}
	return 0;
}

• Subtask 1: 8 / 8
• Subtask 2: 9 / 9
• Subtask 3: 13 / 13
• Subtask 4: 17 / 17
• Subtask 5: 30 / 30
• Subtask 6: 23 / 23